Generation of Richtmyer–Meshkov and secondary instabilities during the interaction of an energy release with a cylinder shock layer

The instabilities and vortices which arise as a result of an energy release effect on a shock layer produced by a blunt cylinder in a supersonic flow are considered. An energy deposition is supposed to have a shape of an infinite heated rarefied channel. The Richtmyer–Meshkov instability accompanied by the secondary instability is simulated inside a front separation area at Mach 1.9. The secondary Kelvin–Helmholtz instability is shown to be generated on the shear layers inside the density stratified vortex caused by the Richtmyer–Meshkov instability. Vortex drag reduction via the Richtmyer–Meshkov instability origination is discussed. The baroclinic nature of the vorticity production is established for the instabilities. Complex conservative difference schemes are used in the calculations.